^^^ I agree. Installed Magnaflow cat back system with an intake and ram air and I am now down to 11.8 MPG. I deleted my resonator and love to floor it all the time because of it. However, it will give you better flow and I have actually seen MPG stay somewhat the same at my local dealership that does custom work on the RT. I would also recommend Borla which is what I wanted but due to college books and tuition, I settled for the Magnaflow. You cant go wrong with the deep sound itll make
